To analyze the effect of health on work, many studies use a simple self-assessed health measure based upon a question such as do you have an impairment or health problem limiting the kind or amount of work you can do?ʺ A possible drawback of such a measure is the possibility that different...

Differences in answers in Internet and traditional surveys can be due to selection, mode, or context effects. We exploit unique experimental data to analyze mode and context effects controlling for arbitrary selection. The Health and Retirement Study (HRS) surveys a random sample of the US 50+...

We analyze wage differentials mobility between the formal and informal sector in urban Mexico, using panel data on five quarters drawn from Mexico's Urban Employment Survey. We develop a dynamic random effects panel data model. It consists of two separate wage equations for the two sectors and a...